She is a broken record, on the verge of shattering completely. Outside the castle, Malcolm and Macduff recognize the pain of the citizens of Scotland. They know that the only way to end it is by cutting off the head of the snake that is Macbeth. Bleed, bleed poor country: great tyranny, lay thou thy basis sure, for goodness dares not check thee. (4.3 36-42)
Macduff had fled to England to join malcolm against Macbeth. To him, Scotland is bleeding, wounded by tyranny. He will not be the villain, as he further explains, but he will be the saviour. He makes this statement a reality by killing Macbeth. The bleeding of Scotland has stopped.
Ambition is proven in Macbeth to be unable to exist without mortal or supernatural consequence when unnatural advancement is punished. The hierarchy of humanity is interrupted, Macbeth loses sight of what it was that he truly wanted and as a result, both he and his wife as well as the whole of Scotland suffer. The ambitious among humanity are both blessed and cursed. They are the ones who keep the world moving, but they are the first to fall should they